.popper {
    position: relative;
}

.popper:hover #tip {
    display: block;
    z-index: 5;
    opacity: 1;
    transition: opacity 0.4s;
    -webkit-transition: opacity 0.4s;
}

.popper-wrapper {
    display: none;
    z-index: -1;
    position: absolute;
    top: 100%;

    opacity: 0;
    transition: opacity 0.4s;
    -webkit-transition: opacity 0.4s;
}

.popper-arrow {
    height: 0;
    width: 0;
    margin: auto;
    border: 6px solid;
    border-color: transparent transparent #eeeeee transparent;
}

.popper-content {
    display: flex;

    min-width: 60px;
    min-height: 20px;
    padding: 4px 10px;
    background-color: white;
    border: #eeeeee 1px solid;
    border-radius: 4px;
    box-shadow: 0 0 5px 0 #eeeeee;
    user-select: none;
}

.standard-content {
    margin: auto;
    font-size: 13px;
    white-space: nowrap;
}

.ref-wrapper {
    font-size: 18px;
}